Archive › Structural patterns › Recovery Attempted, Access Still Blocked
Part of the CustodyStress archive of observed Bitcoin custody incidents
Recovery Attempted, Access Still Blocked
Cases where recovery was actively attempted — through technical means, legal proceedings, exchange support, or professional services — and access remained permanently blocked. These cases document the gap between recovery effort and recovery success.
Recovery-attempted-blocked cases are the most structurally instructive in the archive. They demonstrate that effort, resources, and professional assistance do not guarantee access when the underlying custody structure has failed. Password bruteforce is the most frequently attempted recovery path in this category, reflecting the high proportion of passphrase-related failures where the seed phrase exists but the passphrase does not. Exchange support is the second most common path, with a blocked outcome reflecting institutional failures where no operational recovery mechanism survived the platform's collapse.
199 cases match this pattern in the archive. Among cases with a determinate outcome, 100% resulted in permanently blocked access. 44% of cases in this pattern involved exchange custody. These cases document the gap between recovery effort and recovery success — situations where holders or heirs actively pursued access and still lost it.
100% of determinate cases resulted in blocked or constrained access.
199 observed cases
Six Bitcoin Custody Failures: Exchange Collapse, Laptop Theft, and Deleted Wallets (2020)
Exchange custody
Blocked
2020
In March 2020, a BitcoinTalk forum thread aggregated six real-world Bitcoin access failures from individual users. User garyrowe reported losing keys to a non-B
Wallet.dat Corruption and Salvage Failure After Bitcoin.org Wallet Import
Software wallet
Blocked
2020
An individual who ran Bitcoin software during 2009 and 2010 located an old data file (renamed to xxxx.dat) years later and attempted to recover it. In July 2020
29 BTC Lost in Corrupted MultiBit Classic Wallet After Hard Drive Format
Software wallet
Blocked
2020
In 2014, JAMBO2014 acquired Bitcoin and stored it in MultiBit Classic 0.5.17, a desktop software wallet, without separately recording or backing up the private
Peter Schiff Lost Access to Gifted Bitcoin After App Update, Never Recorded Seed Phrase
Software wallet
Blocked
2020
On January 19, 2020, Peter Schiff, an economist and well-known Bitcoin critic, announced on Twitter that he had lost access to all his Bitcoin. The funds—approx
Livecoin Exchange Compromised by Server Attack — Price Manipulation, Permanent Shutdown
Exchange custody
Blocked
2020
Livecoin, a Russian cryptocurrency exchange, suffered a critical infrastructure compromise on 23 December 2020 when attackers gained control of the exchange's s
Eterbase Exchange Breach: $5.4M Stolen, Limited Recovery
Exchange custody
Blocked
2020
On September 8, 2020, Eterbase, a Slovakian cryptocurrency exchange, discovered unauthorised transfers totalling approximately $5.4 million from its hot wallets
Iroro Wisdom Ovie Killed in Bitcoin-Motivated Home Invasion, Nigeria 2020
Software wallet
Blocked
2020
In January 2020, Iroro Wisdom Ovie was killed during a home invasion in Abraka, Delta State, Nigeria. The attackers were motivated specifically by knowledge tha
Hidden wallet discovered — software wallet (2020)
Software wallet
Blocked
2020
In September 2020, a Bitcoin holder created a paper wallet using bitcoinpaperwallet.com, a website presenting itself as a legitimate tool for generating offline
Atomic Wallet: 2 BTC Permanently Inaccessible After OS Reinstall Without Seed Backup
Software wallet
Blocked
2020
In September 2020, a BitcoinTalk user (dovjann) disclosed a complete custody failure involving approximately 2 BTC held in Atomic Wallet on a Windows laptop. At
Blockchain.com Dormant Accounts: Lost Passwords and Missing Backup Files
Exchange custody
Blocked
2019
Between approximately 2013 and 2019, multiple users of Blockchain.com (formerly Blockchain.info) experienced permanent loss of Bitcoin held in dormant accounts.
Ledger Nano PIN and Recovery Seed Lost: Complete Custody Failure
Hardware wallet (single key)
Blocked
2019
On March 18, 2019, a BitcoinTalk user identified as mad_foodie posted a request for help recovering Bitcoin stored on a Ledger Nano hardware wallet. The user ha
Einstein Exchange Vancouver: $16M CAD Claimed Liabilities, Insolvent Collapse 2019
Exchange custody
Blocked
2019
Einstein Exchange, a Vancouver-based cryptocurrency platform founded by Michael Ongun Gokturk, marketed itself as Canada's fastest-growing digital currency exch
QuadrigaCX Exchange Collapse: $190M Bitcoin Lost After Owner's Death
Exchange custody
Blocked
2019
QuadrigaCX was a Canadian cryptocurrency exchange that collapsed in 2019 following the sudden death of its founder and sole operator. The exchange held approxim
Passphrase unavailable — exchange custody, unknown (2019)
Exchange custody
Blocked
2019
A 2019 BitcoinTalk thread documented a recurring custody failure pattern affecting blockchain.com (formerly blockchain.info) users from the 2011–2014 era. The o
Bitcoin Core Wallet Deleted During Hard Drive Format — No Backup
Software wallet
Blocked
2019
In April 2019, a Bitcoin Core user downloaded the full-node software but encountered synchronization delays due to insufficient storage space. The installation
Wallet.dat Corruption: BerkeleyDB Environment LSN Mismatch After File Migration
Software wallet
Blocked
2019
A user attempted to restore an old wallet.dat file by placing it in their .bitcoin directory and running bitcoind. The wallet file itself appeared structurally
QuadrigaCX Exchange Collapse (April 2019): Mass Custody Loss
Exchange custody
Blocked
2019
QuadrigaCX, founded in 2013 and one of Canada's largest cryptocurrency exchanges, ceased operations on April 15, 2019, with approximately 115,000 users unable t
House Fire Destroyed Hardware Wallet: Single Point of Failure in Self-Custody
Hardware wallet (single key)
Blocked
2019
An individual experienced a house fire that destroyed approximately half their home and most possessions, including a Ledger hardware wallet containing under $1
QuadrigaCX Exchange Collapse: CEO Death Blocks Access to $190M in Customer Cryptocurrency
Exchange custody
Blocked
2019
QuadrigaCX, founded in 2013 and operating as one of Canada's largest cryptocurrency exchanges, ceased operations in January 2019 following the death of CEO and
MapleChange Exchange Collapse: $5M Missing, Hack Unverified, No Recovery
Exchange custody
Blocked
2018
MapleChange, a Canadian cryptocurrency exchange, announced on October 28, 2018, that it had suffered a security breach resulting in the loss of approximately $5
BitGrail Exchange Collapse: 17 Million NANO Stolen, 230,000 Users Frozen
Exchange custody
Blocked
2018
BitGrail, an Italian cryptocurrency exchange, announced on February 8, 2018 that approximately 17 million NANO tokens—valued at roughly $170 million at the time
Bitcoin-Qt HD Wallet Change Address Lost to Deleted wallet.dat File
Software wallet
Blocked
2018
In May 2018, a BitcoinTalk user identified as Tuee22 performed a transaction sending 0.01 BTC to an online vendor using Bitcoin-Qt. The user had maintained a si
Xitong Zou: QuadrigaCX Creditor During Exchange Collapse and Fraud
Exchange custody
Blocked
2018
Xitong Zou was a customer of QuadrigaCX, a Canadian cryptocurrency exchange that collapsed in late 2018. Like thousands of other users, Zou had cryptocurrency h
Kleiman Estate v. Craig Wright: Bitcoin Access Blocked by Knowledge Concentration
Unknown custody system
Blocked
2018
David Kleiman, a computer forensics expert in Palm Beach County, Florida, died in April 2013. His brother Ira Kleiman later alleged that David and Craig Steven
Cointed GmbH Exchange Collapse: Austria, 2018 — Customer Funds Disappeared
Exchange custody
Blocked
2018
Cointed GmbH, founded in 2016 in Kufstein, Austria, operated as a regional cryptocurrency powerhouse: a custodial exchange, mining operation, and operator of on
Other structural patterns
Outcome terms
Survived
Access remained possible under the reported conditions.
Constrained
Access remained possible, but only with delay, dependence, or significant difficulty.
Blocked
Access was not possible under the reported conditions.
Indeterminate
There was not enough information to determine the outcome.
Assessment terms
Survivability
The degree to which a custody system maintains the possibility of authorized recovery under stress.
This archive documents cases where a legitimate owner, heir, or authorized party encountered barriers accessing or recovering Bitcoin due to a failure in the custody arrangement. The central question for inclusion is: did the custody structure fail a legitimate access or recovery attempt?
Inclusion requirements
A case must satisfy all three of the following to be included:
- Legitimate access attempt. The person attempting to access or recover the Bitcoin was the owner, a designated heir, an executor, a legal authority, or another party with a legitimate claim — not a thief, attacker, or unauthorized third party.
- Custody structure failure. The failure was caused by a property of the custody arrangement — missing credentials, structural dependencies, documentation gaps, knowledge concentration, legal barriers, or institutional constraints — not market conditions, individual-level fraud or theft, or protocol-level issues. Platform-level failures that block legitimate user access are in scope regardless of their cause.
- Documentable outcome or access constraint. The case must have a stated or inferable outcome: access blocked, access constrained, access delayed, or access eventually achieved through a recovery path. Cases with entirely unknown outcomes are included only where the structural failure is documented and the constraint is unambiguous.
In scope
- Owner death or incapacity — Bitcoin held in self-custody that becomes inaccessible to heirs or designated parties because credentials, documentation, or operational knowledge were not transferred
- Passphrase loss — BIP39 passphrase forgotten or unavailable, blocking access to a funded wallet even where the seed phrase is present
- Seed phrase or wallet backup unavailable — no independent recovery path existed or the backup was destroyed, lost, or never created
- Device loss without independent backup — hardware wallet, phone, or computer lost or destroyed with no recovery path outside the device
- Documentation absent or ambiguous — heirs or executors cannot determine that Bitcoin exists, which wallet holds it, or how to access it
- Knowledge concentration — only one person knew the procedure, passphrase, or access method; that person is dead, incapacitated, or unreachable
- Multisig quorum failure — a threshold signature arrangement cannot be completed because signers are unavailable, uncooperative, incapacitated, or have lost their keys
- Legal authority / access mismatch — a court order, probate ruling, or power of attorney establishes legal entitlement but provides no technical path to access
- Institutional custody barrier — exchange or platform hacks, insolvency, regulatory seizure, or operational failure that caused a access constraint or failure for legitimate users, whether temporary, prolonged, or permanent. The failure of the custodian to remain available or solvent is itself the in-scope event.
- Forced relocation or geographic constraint — physical access to a device or location required for recovery is blocked by displacement, border restrictions, or political circumstances
- Coercion — the holder was compelled under threat to transfer Bitcoin or disclose credentials during an access event
- Hidden asset discovery — heirs or executors locate a wallet or account but cannot access it due to missing credentials or operational knowledge
Out of scope
- Market losses, investment losses, yield scheme losses, or Ponzi scheme losses
- Hacks or theft targeting an individual's personal security (phishing, SIM swap, social engineering, malware) where the custody architecture itself did not fail
- Unauthorized transfers where the holder's custody system was not the cause of the failure
- Ordinary transaction mistakes — wrong-address sends, fee errors, mistaken amounts
- Protocol-level failures — cryptographic vulnerabilities, consensus bugs, firmware integrity failures
- Deliberate burns or tribute burns
- Cases where the stated loss is unverifiable and no structural custody failure is described
Source and verification
Cases are drawn from public sources including forum posts, news reporting, court documents, academic research, and direct submissions. Each case is reviewed against the inclusion criteria above before publication. Source material is retained and available on request for documented cases.
The archive is observational and descriptive. It does not attempt to document all Bitcoin custody failures — only those meeting the criteria above with sufficient documentation to describe the structural failure and its outcome.